I'm not talking about white-knighting, or silently disapproving of "that guy." I'm talking about actively policing our communities for toxic elements and forcibly ejecting offenders. We have to accept that some ostracism isn't just acceptable, it's needed , no matter how much the memories of our own exclusion might pain us.
This works brilliantly unless and until the person who needs to be booted is a woman. Then what?
Boot them. It's not a hard decision.
Of course, it's important that the boot be because they're jerks, not because they had the audacity to assert themselves.